Buckshot Roulette is a game where you play a game of russian roulette with a shotgun against a creepy dealer and have various items with abilities to help you win. It's small but fun. Can do multiplayer.

Half Sword is a very interesting melee combat game. It's hard to describe but its mainly about their unique way of controlling a melee character and fighting in battles in a medieval themed arena. It's a bit wonky, but very fun.

The Walking Trade is a zombie apocalypse store simulator. You have to run a store and stop zombies from eating your customers.

Retro Rewind is a game where you run a VHS store in the 90s. You gather various VHS tapes, hire employees, and upgrade your shop.

They Are Billions is a game where you try to build up a colony in a world overrun by thousands and thousands of zombies. You'll be attacked in waves and the game manages to run very well even while thousands of individual units are on screen. It's quite difficult.

Edit: Actually want to add one I havent played yet. Thick as Thieves seems like it has a lot of potential.